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WITN ESSE C.

UNITED raras FFICE.

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JAMES A. THORNTON, OF BALTIMORE, MARYLAND, ASSIGNOR rIO EIWARD E. GOLD, OF NEW YORK, N. Y.

H EAT-STO RAG E STEAM -RADIATO R.

SPECIFICATION forming part of Letters Patent N o. 610,292, dated September 6, 1898.

Application filed May 10,1894. Serial No. 510,723. (No model.)

To all whom t may concern: 1

Be it known that I, JAMES A. THORNTON, of the city of Baltimore, State of Maryland, have invented certain new and useful Improvements in Heat-Storage Steam-Radiators,

of which the following is a specification, ref-v erence being had to the accompanying draw-" suitable non-metallic material. This earthenware block is of cylindrical shape and of such a diameter as to fit snugly within and lill the outer metallic casing. To form passages for the traverse of the admitted steam, the earthenwavre core or block is iiuted or corrugatedthat is to say, it is provided at its periphery with longitudinally-extending grooves e e. In addition to the external grooves e c the block B may be provided with one or more central longitudinal perforations or holes f f, constituting steam-passages, two such holes being shown.

The inclosed earthenware block or core absorbs and stores heat when steam is admitted, and subsequently gives it gradually o. Consequently the radiator `is especially adapted for heating railway and tramway cars where steam can be admitted only atl short intervals from time to time.

The objects of the external corrugations or grooves e e are to constitute steam-passages; to enable the block or core to be inserted readily in place in the casing when the latter has not a smooth bore, owing to the presence of burs or fins due to the method of making; to permit the rapid initial heating of the apartment in which theradiator is located, since the external groovesY permit the steam to come directly in contact with the metallic 5o casing, through which the heat is at once radiated into the apartment, and to extend the duration of the heat-storing capacity of the radiator, since owing to the circumstance that onlya portion of the earthenware block is in contact with the metallic casing the heat is less rapidly conducted away than would be case if the entire periphery of the block were in contact with the metallic casing.

In case the length of the radiator requires 6o it the core may be composed of a plurality of the earthenware blocks.

To prevent the ilaking and scaling oft of the core due to the admission ofsteam and alternating contraction and expansion, the clay or other material of which the core is composed is preferably,before baking,mixed with a non-combustible iibrous material, such as asbestos or mineral wool. These incorporated non-combustible fibers prevent the disinte- 7o gration of the earthenware core.

It will be noted that thesteam-passages are formed by the relative shape of the core and inclosing casing.

I claim as my invention- 1. A radiator consisting of an outer conducting-casing, and a steam-pipe opening thereinto, combined with an inclosed heatstorage body of earthenware oranalogous material filling said casing, the casing and stor- 8o ageV body being relatively shaped to form steam-passages between them, substantially as set forth.

2. A radiator consisting of an outer conductingcasing, and a steam-pipe opening thereinto, combined with an inclosed heatstorage body of earthenware or analogous material lling said casing and formed with longitudinal grooves to form steam-passages vbetween it and the casing.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

JAS. A. THORNTON.

Witnesses ARTHUR` S. BRowNn, PAUL. M BURNETT. 

